package com.imooc.security.browser.controller;

import com.imooc.security.browser.support.SimpleResponse;
import com.imooc.security.core.properties.SecurityProperties;
import org.apache.commons.lang.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.security.web.DefaultRedirectStrategy;
import org.springframework.security.web.RedirectStrategy;
import org.springframework.security.web.savedrequest.HttpSessionRequestCache;
import org.springframework.security.web.savedrequest.RequestCache;
import org.springframework.security.web.savedrequest.SavedRequest;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@RestController
@ResponseStatus(code = HttpStatus.UNAUTHORIZED)
public class BrowserSecurityController {

    Logger logger = LoggerFactory.getLogger(getClass());

    //跳转url 之前把 http会把请求缓存到HttpSessionRequestCache中
    private RequestCache requestCache = new HttpSessionRequestCache();

    //spring 的重定向工具类
    private RedirectStrategy redirectStrategy = new DefaultRedirectStrategy();

    @Autowired
    private SecurityProperties securityProperties;


    /**
     * 当需要身份认证时 跳转到这里
     *
     * @author yuelinbo
     * @date 2019/2/26 16:14
     **/
    @RequestMapping("/authentication/require")
    public SimpleResponse requireAuthentication(HttpServletRequest request, HttpServletResponse response) throws IOException {


        SavedRequest savedRequest = requestCache.getRequest(request, response);
        if (null != savedRequest) {
            String targetUrl = savedRequest.getRedirectUrl();
            logger.info("引发跳转的请求是" + targetUrl);

            //如果是浏览器请求
            if (StringUtils.endsWithIgnoreCase(targetUrl, ".html")) {
                redirectStrategy.sendRedirect(request, response, securityProperties.getLoginPage());
            }
        }
        return new SimpleResponse("访问的服务需要身份认证！");
    }
}
